Jacking attachment



Nov. 17, 1936. M, DWORK 2,061,025

JACKING ATTACHMENT Filed May 3, 1935 2 Sheets-Sheet 1 Nov. 17, 1936. M. DWORK JACKING ATTACHMENT Filed May a, 1955 2 Sheets-Sheet 2 Patented Nov. 17, 1936 UNITED STATES [PATENT OFFICE JACKING ATTACHMENT Max Dwork, Brooklyn, N. Y. Application May 3, 1935, Serial No. 19,742 a Claims. (01. 280-150) This invention relates to improvements in jacking attachments in the class of land vehicles, attachments, and its objects are as follow First, to p'r-ovide a jacking attachment which 5 is intended especially for use on automobiles,

although. it is not confined to that use, its outstanding purposes being to facilitate jacking up the chassis, limiting the sag of the rear springs, and generally improving thejacking attachments 10' of Max'Dwork disclosed in Patent #1,928,171 of September 26, 1933 and the co-pending patent application filed April 11, 1934, Serial #720,118,

now Patent 2,003,502 of June 4, 1935.

Second, to reduce the linkage for actuating the i6 swinging hook to a detent arm and a simple link, the adjacent rear spring being employed as the mount for a combined guide and coacting detent for said arm, the equivalent stiff leg of the copending application now being used chiefly as a 2 spring and roller mount so as to avoid drilling extra holes in the chassis.

Third, to provide the rear spring with a simple,

rigid socket to receive the head oi the jack and' prevent its-slipping out of position. 25 In the ,drawings:- Figure 1 is a cross section of the rear axle of an automobile, taken immediately inside of the left rear, wheel (not shown) and showing thev Figure is a cross section taken on the line. 5-5 of Figure 1, illustrating the simple jack head socket.

Figure 6 'is a perspective view of the detent arm.

Figure '7 is a perspective view of the stiff 45 brace, particularly illustrating the means for adapting 'it to the shackle members.

Figure 8 is a cross section of the spring shackle construction, showing the stiff brace in position.

Figure 9 is .a perspective view illustrating the adaptation of .a modified form of the stiff brace to another shackle of the open type.

Figure 10 is a longitudinal sectional view of an automobile chassis, illustrating an arrangegg ment for actuating the pivoted hook from a lever which is accessible from the compartment under the front seat.

Figure 11 is a perspective'viewof the brackets referred to in the description of Figure 2.

Figure 12 is a perspective view of the stifi leg 5 also referred to in the description of Figure 2, this, however, being of the modified type shown in Figure 10.

Figure 13 is a perspective view of one of the jack shaft brackets. Y 1

Figure 14 is a cross section taken on the line i4--l4 of Fi ure 10.

The instant jacking attachment is an improvement particularly on the jacking attachment disclosed in the co-pending application flied by Max 15 Dwork April 11, 1934', Serial #720,118. The chief purpose of both the instant and allied inventions is to provide means for limiting the sag of the rear spring (herein chiefly referring to only one) of an automobile when jacking up the chassis at a place other than beneath the axle.

Such parts disclosed herein and which are common to the foregoing application and patent comprise the rear axle l, rear right wheel 2, left spring 3, a portion 4 of the chassis and the book 6. The shankl of the hook has a series of holes 8, a selected oneof. which receives the hook bolt 9 (Fig. 2). The hook 6 is held on the bolt by a nut l0, which nut aids in securing the still leg to the chassis portion 4.

A bracket ll (Fig. 11) is interposed between the chassis portion 4 and the stiff leg, and in this instance the main purpose of the bracket is to reinforce the stifl leg. To this end it has a pair of ofiset pins l2 which are inserted in holes I3 in the side of the chassis 4. It has holes i 4, I5, respectively containing the hook bolt 9 (Fig. 2) and a bolt I6 which secures the bracket and stiff leg together. The bracket has inwardly directed ears l1 which engage the nether side of the chas- 40 sis portion and provide the desired reinforcement. These ears are the equivalents of the shoulder in the co-pending application in which said bracket is claimed.

From here on the description identifies the improvement. The stiff leg [8 is now chiefly used as the mount for one end of a coil spring [9 and of a roller 20. The other end of the spring 19 is connected with the hook shank I, and its purpose is to draw the hook 6 toward the axle i into a 5 catching position so as to limit the sag of the spring 3. However, the spring is prevented from doing this until the hook is released. The stiff leg has a head portion 2|. This is shown secured at 22 to the chassis 4, there being an offset 23 the interposed bracket II. The still leg may be attached solely to the bracket as in the co-pending application, the securing means 22 showing mainly how the mounting of the assemblage can be strengthened.

A flange 24 standing off from the head portion 2| is slotted at 25 (Fig. 2) to contain the upper end of the hook shank 1. The walls of the slot provide a guide for the hook shank, tending to prevent any'undesired lateral play or the hook shank on the bolt 9. That end of the shank above the flange has a hole 26.

Linkage by which the hook 6 is actuated, now consists of the detent arm 21 and a simple link 28. These two members have a pivotal connection 29. The link 28 has a series or holes 30 for a possible adjustment of the pivotalv connection as when the attachment is applied to diflerent makes of. automobiles. The remaining end of the link 28 is pivoted at 3| to the hook shank 1. The arm 21 is out at 32 (Fig. *5; or formed. however else might be found convenient, to provide a detent notch 33 and point 32 I Either the notch or the point can serve as part or the detent, and when the detent is in the locked position (Fig. 1) the hook 6 is held retracted against the tension of the spring I9. Upon desiring to let the spring move the hook into the catching position under the axle i the detent arm 21 is released from the lockedposition whereupon the spring accomplishes the purpose as will be clear.

The spring 3 is now used as the mount for a combined guide and coactin detent generally designated 35. This is formed to provide a passage 36 (Fig. 3), and it is in this passage that the arm 21 is guided in its back and forth movements. A plate 31 (Fig. 4) extends across the passage immediately beneath the arm 21, and one of its ends 38 which provides a shoulder is engaged either by the notch 33 or point 34, or by both, thereby providing the remainder of and the coactingpart or the foregoing detent.

A'roller 39 provides a support for the arm 21,

and reduces the friction oi its movement when the arm is shifted. A bowed spring 40 presses down on the arm and tends to keep it in contact with the roller. This is true whether the cut 32 or the normal underside oi the arm are in contacting position. It is to be noted that the cut 32 is long enough (Fig. 4) to allow tor the retraction of the detent point 34 from beneath the end 38. The spring 40 is secured at the top or the passage 36 by a rivetor equivalent means H. In order to insure the retention of the arm 21 in the locked position, a tapered pin 42 (Fig. 8) is inserted in registering holes in the guide 35 and arm 21.

A flange 43, or its equivalent, is secured. "to the spring 3 so as to support the guide 35 in the desired pendent position It is to be borne in mind that the member 35 is provided solely for the guidance and locking of the arm 21 of the linkage, and that the linkage is not actually connected to the guide 35 as it is to the stiff legin the co-pending application A simple socket 48 (Figs. 1 and 5.- ls for the purpose of the jack (not shown), the socket bottom. 15 being roughened to further prevent slipping of the jack head when inserted. The socket is laterally flanged at 46 to receive the bolts 41 which secure the socket to the spring 3. The socket is.further provided with lugs 48 at the front and back for the purpose of stabilization. These lugs bear directly against a plate 50.

2,061,025 '(Fig. 2) in the head portion to make room for This plate is known as a rack plate in Patent 1,964,625 of June 26, 1934 to Max Dwork, relating particularly to an adjustableiack socket. In the instant application said plate is mainly used as a reinforcement for the spring end, the forward extension 51 of the plate (Fig. 1) ooacting with the flange 43 of the guide 35 in receiving the bolts 52 (Fig. 3) which secure the flange as previously stated.

The bolts 41 go through the plate 59 and through the ears 53 of a clamp plate 54. The rear end of the clamp plate is brought close up to one side of the spring knuckle 55 (Fig. 8). A curvature 55 on-the rear end of the" plate 53 is brought close to the other side of the spring knuckle, the two working together in preventing the socket 44 irom slipping either forward or backward on the spring, it being further noted that the plate has several oil'sets 51 in confronting positions with the ends of the spring leaves.

Provision is made of a still brace for transierring the lifting force applied to the socket 4 5 to the chassis l, and to relieve the shackle bolts 53 (Fig. 8), especially the upper shaclrie bolt, 01 some of the strain in doing so. A brace for this purpose is claimed in Patent 1,984,625, but in the type or brace under present consideration, which type is claimed in a division of the instant application filed by Max Dwork June 28, 1935, Serial No. 28,970, use is made of pairs of lugs 59 (Fig. '7) through which to insert bolts 68 (Fig. 1) for fixedly attaching the brace plate I to the shackle members 62. These members comprise what is known as a closed shackle and consist or duplicate links which connect the ends of the spring and chassis by means of the bolts 53 mentioned.

The lugs 59 extend above andbeiow the stay bolt 63 (Fig. 8) which customarily clamps the shackle members iii-position on the eiids oi the shackle bolts. Sometimes the threads either in the nut or on the end of the stay bolt become stripped, and in such event there is ordinarily nothing to prevent the shackle members from falling apart. One oi the purposes of the brace plate 66 and its lugs 59 is to confine the shackle members and prevent their becoming loose or lost in the event of the stay bolt 63 coming out.

This brace plate has an integral saddle 54 which fits under the knuckle 85 (Fig. 8) of the chassis. The saddle and brace plate are very stifi, the two providing the still brace, mentioned before, which, for its other purpose, transfers the lifting power to the chassis. A-curvature .02 less extent than the saddle 6i, bears on the spring knuckle 55.

Some spring shackles are of the open type as shown at 61 in Fig. 9. This shackle is of a U- shape. For the purposes of this type a still brace more on the order of the one disclosed in Patent 1,964,625 has been found preferable. This brace includes a saddle 68 to contain the knuckle of the chassis as shown in Fig. 9. This saddle is made part or a plate 6! which can be regarded as the equivalent of the clamp plate 84 in Fig. 1. This clamp plate has ears 10 which are for the same purpose as the cars 53 in Fig. 1.

From what has beenstated it can be understood that so far the operation of the sag limiting means is accomplished by a person standing in the rear of the automobile. An alternative provision is made for accomplishing the operation from the front end oi the automobile, more speciilcally from a position under the front seat. Most of the parts already described are used in modified Fig. 10, and inasmuch as the purposes and operation are identical the parts are identified with corresponding reference numerals having the exponent letter a, without necessarily repeating the description.

The head portion 2la of the stiff leg lBa is provided with a cage H (Fig. 12) which supports the pin of a roller 12. This roller provides one of the guides for a cable 13, equivalent to the link 28, or other flexible element which, after being attached to the hook shank la at the previously described hole 26 is directed over the roller 12,

under the roller 20 and forwardly to a place of axle I, In so as to catch the axle and limit the sag of the spring 3, when jacking commences. The

stifi brace 6|, 64 (Figs. 1 and 8-) transfers the lift-- ing force from the spring to the chassis 4, 4a.

' The lugs 59 and bolts to give the brace the addiconnection with a jack shaft 1 4. This place of connection comprises a short arm '55.

Mention was previously made of the description being confined largely to one jacking attachment. It will be understood that there will be at least two jacking attachments, one for each rear wheel. This is perhaps more apparentin Fig. 14, wherein the jack shaft it is shown as provided with two short arms it, one for each of the cables it.

A lever '16, equivalent to the arm 2?, extends up from the jack shaft 14 to the interior of the front seat box l'i. removing the seat 18. In order that there will be suiilcient leverage, the lever 16 has a pivoted extension it which, when straightened. can

1 rigidly coupled by a sleeve 80 which can either be slid down or will ride into position over the pivot by gravity (Fig. 13).

The shaft it is journaled on a pair of brackets 89. These are attached to the floor boards and extend downwardly. Neither these brackets nor the lever it are in the way of' the seat box Ti The operation is readily understood. The arrangement in Fig. 1 enables an operation. of the sag limiting means from the rear of the automobile. The arrangement in Fig. 10 enables operation from a position near the front. Usually the jack and other tools are kept in the seat box, and

upon removing the front seat for the purpose oi getting the jack it becomes a matter oi convenience for the operator to set the hook tie in the catching position at the same time.

One of the distinctions between Figs. 1'. and 10 is that according to the arrangement in Fig. l the two sag limiting means it are separatelyand independently operable, whereas according to Fig. 10 both sag limiting means in are simultaneously operable. However, the latter mode of operation is not necessarily adhered to because by simply dividing the jack shaft "it and provid ing it with two levers it each oi the sag liniiting means of the form in Fig. 10 can be individually operated as in Fig. 1. Despite the difference of positions from which the sag limiting means in Figs. 1 and 10 are actuated, there is identity oi means insofar as the arm 2i, lever i6, connecting link 28, cable It and detent means 38, 36, as and M are concerned, this as already suggested in the earlier description.

Prior to jacking up the frame on either one side orthe other the saglimiting means 6', ea wiilbe, brought into the catching position beneath the The lever is accessible upon tional function of holding the shackle members 62 together in the event the stay bolt 63 becomes disabled. As to the form in Fig. 1, it is repeated that the guide 35 mainly guides the arm 21 of the actuating linkage. Its other purpose is to provide a coacting detent, the manner of interengagement of the arm and detent being plainly shown in Fig. 4.

I claim:- 7

1. In a jacking attachment which comprises a hook and means for pivotally mounting it on a chassis; linkage connected at one point with the hook for swinging the hook toward and from an axle, detent means incorporated in 'one'part of the linkage, a combined guide and detent coacting shoulder, the guide containing said part of the linkage for guidance when swinging the hook and its shoulder coacting with the detent means to lock the linkage in one position, and means by which said guide is attached to an adjacent spring.

2. In a. jacking attachment which comprises arm having means constituting part of a detent,

guide means containing the arm for guidance,

and means by which the guide means is attached to a spring, said guide means having a detent shoulder with which the detent means of the arm is interlocked to hold the hook in a non-catching position beside an axle.

3. In a jacking attachment which comprises a hook and means for pivotally mounting it on a chassis; a link and means by which one end of it is pivotally connected with the hook, a detent arm and meansby which the other end of the link is connected with the arm, guide means and means by which it is attached to a spring, said guide means having a passage in which the arm is contained for guidance, coacting detent means on the arm and guide means capable of being interlocked when the, arm is moved to shift the hook to a non-catching position beside an axle, a roller carried by the guide means, and aspring to press the arm into contact with the roller.

4. In a jacking attachment which comprises a hook and means for pivotally mounting it on a chassis; linkage for actuating the hook, said link age including an arm, guide means and means by which said guide means is attached to a spring, said guide means having a passage containing the arm for guidance when moving the arm to swing the hook, coacting detent means on the arm and guide means which are interlocked to hold the.

hook in a non-catching position beside an axle, and auxiliary locking means comprising a tapered pin and holes in the arm and guide means age including an arm which has a cut formed to provide detent means, guide means and means by which the guide means is attached to a spring saidguide means having a passage in which the arm is movablefand a plate on the guide means 75 across the passage, one end of the plate constituting a detent to coact with the detent of the arm for establishing a locking position of the arm.

6. A jacking attachment comprising a hook, a stiff leg and means by which it is fixedly attached to a chassis, a pivot for the hook on the stifl leg, a spring which has its ends attached to the still leg and to the hook so as to draw the hook into a catching position beneath an axle, and means also attached to-the hook for swinging the hook against the tension of the spring, said stifi leg including a head portion which has a flange with a slot containing a part of the hook for the guidance of the hook in its swinging movements.

'7. A jacking attachment comprising a hook, a stiff leg and means by which it is attached to a chassis, a pivot for the hook on the still leg, said stiff leg including a head portion which has a flange with a slot containing a portion of the hook for guidance, a cage on the flange, said cage and the stilt leg supporting rollers, a spring having its ends attached to the stifi leg and hook, a cable attached at one end to the hook portion above the flange and being guided over the rollers, a lever to which the other end of the cable is attached for operation of the cable against the tension of the spring, and means by which the lever is movably supported, said means including a detent for holding the lever in a position to maintain the spring under tension.

8. In a vehicle which includes a chassis, floor boards, a seat box and a spring-supported axle; a jacking attachment comprising a hook and means by which it is pivotally mounted on the chassis adjacent to the axle, a lever, a connection between the lever and the hook so that when the lever is moved the hook is swung with respect to the axle in at least one direction, a bracket on which the lever is pivotally mounted, said racket being attached to the floor boards within the cc-nfines of the seat box, a spring which has one end attached to the hook and is so anchored at its other end as to draw the hook into a catching position beneath the axle, and means in the bracket providing a detent by which the lever is detained against the tension of the spring to hold the hook in a non-catching position.

MAX DWORK. 25 

